Question

I want to build hash map to contain

<string, array and double(sum(double2).
array contain string, int1, double1, double2 (int1*double1) 

for example:

string1, word1,2,1.1,2.2 , 7.3 (2.2+1.1+4.0)
string1, word2,1,1.0,1.1 , 7.3
string1, word3,2,2.0,4.0 , 7.3

string2, ... 
..
...
stringn,....

Answer 1

You should really create a class to hold this data. HashMaps (and Maps in general) are for ‘mapping’ one thing to something else, not for holding a plethora of unconnected items.